this kind of dress is better/ popular (of) this year,and i really want to get one.
rife也有流行盛行的意思,你最好用popular,我感觉rife有点贬义的意味,比如你可以说“甲型H1N1 流感是盛行的,这里就用rife,所以感觉这词不太好,还是popular 好了,当然better是跟前两年做个比较,指这个衣服今年更好,所以你才想得到一件,也是可以的.